diff --git a/include/llvm/CodeGen/SelectionDAG.h b/include/llvm/CodeGen/SelectionDAG.h
index 49dbd4347a1..3c1c031bd76 100644
--- a/include/llvm/CodeGen/SelectionDAG.h
+++ b/include/llvm/CodeGen/SelectionDAG.h
@@ -117,7 +117,7 @@ public:
   /// viewGraph - Pop up a GraphViz/gv window with the DAG rendered using 'dot'.
   ///
   void viewGraph(const std::string &Title);
-  void viewGraph() { return viewGraph(""); }
+  void viewGraph();
   
 #ifndef NDEBUG
   std::map<const SDNode *, std::string> NodeGraphAttrs;
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGPrinter.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGPrinter.cpp
index 19a3e49055e..ea86c0d591c 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGPrinter.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGPrinter.cpp
@@ -252,6 +252,11 @@ void SelectionDAG::viewGraph(const std::string &Title) {
 #endif  // NDEBUG
 }
 
+// This overload is defined out-of-line here instead of just using a
+// default parameter because this is easiest for gdb to call.
+void SelectionDAG::viewGraph() {
+  viewGraph("");
+}
 
 /// clearGraphAttrs - Clear all previously defined node graph attributes.
 /// Intended to be used from a debugging tool (eg. gdb).